- Book of Wise Sayings
- Voltareis ó Christo?
- 道德经
- The Destiny of Man
- De l'importance des livres de raison
- Ethics — Part 4
- A Philosophical Dictionary, Volume 4
- Flores do Campo
- The Selections from the Principles of Philosophy
- Study of a Woman
- Secret Societies
- The Existence of God
- De veritate religionis Christianae. French
- Noites de insomnia, offerecidas a quem não póde dormir. Nº4 (de 12)
- Philosophie de la Liberté (Tome I)
- Feuerbach: The roots of the socialist philosophy
- Littérature et Philosophie mêlées
- Utilitarianism
- Filosofía Fundamental, Tomo I
- Ethica
- Improvement of the Understanding
- Ethica. English
- Categoriae. English
- Essays of Schopenhauer
- Thoughts out of Season Part I
- Homer and Classical Philology
- Ainsi Parlait Zarathoustra
- Statesman
- Sophist
- Pedagogics as a System
- The Map of Life
- Catherine De Medici
- De profundis
- Entretien d’un père avec ses enfants
- Entretien d’un père avec ses enfants
- How to Marry Well
- The Soul of Man under Socialism
- Salve, Rei!
- Noites de insomnia, offerecidas a quem não póde dormir. Nº 9 (de 12)
- A philosophia da natureza dos naturalistas
- Sociologia Chinesa: Autoplastia
- Gorgias
- Ethics — Part 2
- Esprit des lois
- The Philosophy of the Moral Feelings
- Habitações Operarias
- The Ethics of Aristotle
- Ceci n'est pas un conte
- Notes from the Underground
- Protagoras
- Lessons in Life, for All Who Will Read Them
- A Philosophical Dictionary, Volume 1
- El Criterio
- The Philosophy of Evolution
- The Ego and His Own
- The English Utilitarians, Volume I.
- A Essay Towards a New Theory of Vision
- Ethics — Part 1
- Politics: A Treatise on Government
- The Consolation of Philosophy
- De la littérature des nègres, ou Recherches sur leurs facultés intellectuelles, leurs qualités moral...
- Filosofía Fundamental, Tomo II
- Apology
- The Critique of Practical Reason
- Crito
- Essays
- The Golden Sayings of Epictetus
- The Memorable Thoughts of Socrates
- The Critique of Pure Reason
- The Metaphysical Elements of Ethics
- A Saudade
- Seekers after God
- A Treatise of Human Nature
- Thus Spake Zarathustra
- Fundamental Principles of the Metaphysic of Morals
- Discours de la méthode
- Poetics. English
- The Republic
- Laws
- L'homme Qui Rit
- Another Study of Woman
- Chronica de el-rei D. Affonso Henriques
- Beyond Good and Evil
- The Young Woman's Guide
- Auguste Comte and Positivism
- An Enquiry Concerning Human Understanding
- Essays
- Civil Disobedience
- A Lie Never Justifiable
- Novelas de Voltaire — Tomo Primero
- Ethics — Part 3
- Miragaia
- Apology, Crito, and Phaedo of Socrates
- Compendio da relaçam, que veyo da India o anno de 1691
- The Prince
- Despedidas: 1895-1899
- Réflexions ou sentences et maximes morales
- Filosofía Fundamental, Tomo IV
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- A Philosophical Dictionary, Volume 10